Former GOP Sen. Jeff Flake (Ariz.) has filmed an ad for former Vice President Joe Biden, using the spot to urge Republicans to put "country over party" and support the Democratic presidential nominee. “I’ve been a conservative Republican my entire life,” Flake says at the start of the ad released Wednesday, noting the first time he cast a presidential ballot was for Ronald Reagan in 1984. “I’ve never before voted for a Democrat for president.” “But this year, principle and conscience require me to do just that,” the former elected official continues. “I’m voting for Joe Biden.”